Drop staff brake mechanism



my 9,1935., P. B, CAMP www DROP STAFF BRAKE MECHANISM Filed Aug. 2, 1954Patented July 9, 1935 VVVonor STAFF BRAKE MEcHANisM Percy B. Camp,Maywood, Ill., assignorto Universal Draft Gear Attachment Co.,a'corporationv of Illinois Application August 2, 1934, serial No.738,027r

claims. (c1. 74-510) The invention relates to brake mechanism `of theso-called multi-power type, especially adapted for use on flat cars, thestaff being vertically movable `in order that it may be lowered out ofthe 5 way of the lading.

The objects of the invention are to simplify theconstruction,particularly with reference to the mounting of a gearpinion with the staff, and to provide, for the secure support of thestati in itselevated position.

,- In the` accompanying drawing illustrating a desirable form ofembodimentv 0f the invention,

` Fig. 1 is a detail, longitudinal section of a car body and its brakeactuating mechanism, the staff being shown in elevated position. Y

Fig. 2 is a detail section on the line 2-2 of Fig. 1; j

Fig. 3 is a detail section on the line 3-3 of Fig. 2;

Fig. 4 is a View in perspective of one of the` pivot pins for carryingthe staff supporting stirrup;

Fig. 5 is a view in perspective and partly in section of an element ofthe housing for the brake mechanism; and

Fig.l6 Yis a view in perspective of the stair supporting stirrup.

The floor of a flat car is represented at I0 and,

the end sill thereof at Il. The brake actuating mechanism comprises ahousing element I2, secured to the end sill, as indicated at I3, andcarrying a gear wheel I4 with which is connected a winding drum I5 towhich the draw chain I6 of the brake is attached. This mechanism furthercomprises a housing element I1 within which is journalled a shroudedpinion I8 which meshes with the gear I4.v The element I'I bears a pairof bushings I9, 2Q, for the upper Aand lower journals of the pinion I8.Immediately above these journal surfaces of the pinion are a pair ofshoulders 2 i, 22, which rest upon the journal bearings for the pinion.The gear I4 engaging the pinion between its shrouds prevents its upwardmovement.

The socket of the pinion I8 is square and slidingly receives the squaredbrake staff 23. The stai may be lowered to bring the hand wheel 24 tothe level of the car oonwhen it is not in use, and when raised its lowerend rests upon a swinging U-shaped stirrup 25, which is carried by pivotpins 2li setting through side walls of the elements I1, and outstandinglugs 21 carried by this element. The pivots 26 are non-rotative and. areshown as a flat plate, their sockets 28 being of corresponding form. Thesockets 29 in the stirrup arms are suiciently large to permit turningmovement of the stirrup about the pins 26, but each is provided at itsupper margin with a slot 30 for receiving the upper margin of the 5pivot pin, as a key, thereby preventing the turning p oi the stirrup.

When the stirrup is so positioned that the pivot pins occupy the slots3o, the cross arm of the stirrup is directly in line with the stai 23and holds the latter in its elevated or operative position. When it isdesired to lower the staff the stirrup is raised suiiciently to free itsslots 30 from vthe keys, and it is then swung forwardly, permittingthestai to descend through the pinion IB. When the staii is again raisedto clear the stirrup the latter swings backwardly by gravity until itsslots 3!) register with the pins 2li, whereupon it comes to rest and issecurely locked in stair-supporting position until again manuallyreleased.

At 3l is conventionally shown means for holding the brake staff againstrotation, and at 32 a stud through the lower end of the staff to limitits upward movement. 25

While the disclosed embodiment of the invention is highly eiiicient, itmay obviously be variously changed within the scope of the appendedclaims.

What I claim is:

l. In a drop staff car brake, in combination, a vertically movablestaff, a housing through which the sta may slide, a U-shapedoscillatable stirrup for supporting the stati in its upper position,vertical lugs formed on the housing adjacent the location of the staff,pivots extending through the lugs and the arms of the stirrup, one ofsuch pivots being fixed against rotation relatively to one of the partsit unites, they pivot aperture of the other part having a radialextension for receiving and holding the pivot when the cross member ofthe stirrupis in they path of movement of the stair.

2. In a drop staff car brake, in combination, a vertically movablestaii, a housing through which the staff mayslide, a U-shapedoscillatable stirrup for supporting the staff in its upper position,verticallugs formed on the housing adjacent the location of the stair,pivots extending through the lugs and the arms of the stirrup, one ofsuch pivots being out of round and non-rotative, the

3. In a. drop brake for cars, a suitable housing, a staff verticallymovable through the housing, a stirrup pivoted to the housing forsupporting the staff, a pivot pin xed in the housing and having a rib onits upper face, and the pivot socket in the stirrup having a recess atits upper side for receiving the rib when the stirrup is instaff-supporting position.

4. In a drop staff car brake, in combination, a stai, a housing throughwhich the staff may slide, a stirrup pivotally connected with thehousing for supporting the stati", the pivot pin of the stirrup beingout of round and fixed to one of the connected parts, the socket in theother part having a radial recess for engaging and retaining the pivotwhen the stirrup is in supporting position.

5. In car brake mechanism, in combination, a vertically movable brakestaff, a U-shaped stirrup for supporting the staff in its elevatedposition, a fixed pivot located laterally of the staff upon which thestirrup is suspended, the stirrup being oscillatable about the pivotfrom a position immediately below the stai when raised to the remoterside of the stai when lowered, the pivot aperture of the stirrup havinga lateral recess positioned to receive and interlock with the pivot Whenthe cross-member ot the stirrup is beneath the staff.

' PERCY B. CAMP.

